Ventilating guard for windows



April 14, 1931. T. J. NELSON 1,300,804

VENTILATING GUARD FOR WINDQWS Filed June 24, 1929 //v VEN TOE7745000122] NELSON.

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Patented Apr. 14, 1931 UNITED STATES Lsoasru THEODORE J". NELSON, OFCHICAGO, ILLINOIS, ASSIG-NOR ILLINOIS VENTILA'IING GUARD FOR :WINIDOWSApplication filed. June 24,

My invention relates to an improved construction of ventilating guardfor windows, for example of the kind using sliding sash, so that theguard when in use will permit the opening 01? the sash to a limitedextent, and prevent opening the sash beyond that amount, to the end thatventilation may be secured without permitting the window to be openedfar enough to permit a person to enter the building through the window.

My invention consists of a construction which is simple in nature, easyto operate, inexpensive to manufacture, and yet at the same timeeiiective in use. 1

My invention will best be understood by reference to the accompanyingdrawings showing a preferred embodiment thereof, in which Fig. 1illustrates a part of a pair of sliding sash in perspective view with myventilating guard in the position it occupies to limit the opening ofthe sash, and

Fig. 2 shows in a view similar to Fig. 1, my guard in the position itassumes when it is desired to permit the sash to be opened to their fullextent.

Similar numerals refer to similar, parts throughout the several views.

As shown in the drawings, I illustrate a part of a window frame at andshow cooperating with the window frame, parts of upper and lower sash at11 and 12.v My ventilating guard consists of a metal mounting plate 13,preferably of sheet metal, secured to one of the sash, for example thesash 11,

which is the upper sash, by screws lei as indicated.

The inwardly extending end of the plate 13, is rolled or wrapped into aneye or bearing 13a through which one member 15a oi the stopping device,extends. The member 15a is preferably cylindrical and of suitable metal,for example a round iron or steel rod, and is bent at substantially aright angle to 3 form a stop in member 15?) extendin horizontally toproject into the pathof the lower sash when in its stopping positionshown in Fig. 1, or to lie in the space adjacent the glass 16 of theupper sash when it is not desired to use the guard. The upper end of theverti- 1929. Serial N0. 373,179.

cal portion 15a has rigidly secured to it, a disk "or head 17 betweenwhich and the upperedge of the eye 13a, a spring. 18 is disposed,whichtends to raise the member 15a as far as the plate 13 and itseye13a-will permit. The plate 13 has formed in its notch 19 which is inline with the eye 13a, so that when the member15b is in its stoppingposition indicated in Fig. 1, it will rest in said notch, being movedinto said notch by the actionof the spring 18; For thisrelationoftheparts, the stopping member 1512 not only prevents raising the lowersash 12 beyond the predetermined amount permitted by the location of theplate 13 on the upper sash 11, but in addition, rotation of the stoppingmember 156 from itsstopping position is prevented by its engagement withthe notch 19 This permits opening the window, either by raising thelower sash, or lowering the upper sash, sulliciently for purposes ofventilation, and yet permits restricting the amount ofthis opening sothat intrusion through the open window is impossible.

To move the stopping member 156 to its releasing position, the head 17is'depressed against the action of the spring 18, to release thestopping member from the notch 19, and

To in. M. tonne, or onroneo,

said member is then turned to its position indicated in Fig. 2, in whichposition the tension of the spring 18 serves to retain it againstaccidental turning movement due to jarring or rattling of the sash towhich it is secured.

It will be observed that the construction described is of extremesimplicity, consisting as it does of but three parts, namely thesupporting plate, the bent stopping member and the spring. It willfurther be observed that the plate and stopping member may be easilyformed by simple tools, that the amount of material required inconstructing the ventilating guard is small and that therefore themanufacturing cost is low. This is a marked advantage particularly wheremany windows require protection of the kind afforded by my device.

While I have shown my invention in the particular embodiment abovedescribed, it will be understood that I do not limit myself to thisexact construction as I may employ equivalents known to the art at thetime of the filing of this application without departing from the scopeof the appended claims.

What I claim is:

1. In a ventilating guard for windows, the combination of a mountingplate of metal having an eye, a bent metal rod having a first portionmovable angularly and longitudinally in said eye and a second portionpro- 7 I jecting to constitute a stopping member, the Wall of said eyehaving a notch through it to receive said rod in its stopping positionto restrain said rod from angular movement in said eye, and a springtending to hold said rod in said notch.

2-. A ventilating guard comprising a metal mounting plate having abearing, a bent metal rod having; a first portion in said bearing formovement therein and a second portion extending at substantially a rightangle to said first portion, and'a spring around said first portionholding said second portion against said plate; V

In Witness whereof, I hereunto subscribe my name this 10th day of June,A. D. 1929.

THEODORE J. NELSON.

